Air treatment device



FIG. 1 is a front perspective view of an air treatment device showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a first side elevation view thereof;

FIG. 5 is a second side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The portions of the design depicted in broken lines form no part of the claimed invention. 

CLAIM The ornamental design for an air treatment device, as shown and described. 